Check a job applicant's right to work: use their share code
...Use a job applicant's share code to check they're eligible to work in the UK if they?re from outside the UK and Ireland....
https://www.gov.uk/view-right-to-work
Checking a job applicant's right to work - GOV.UK
...You can find out more about IDVT in the employer?s guide to right to work checks. British and Irish citizens cannot get an online share code to prove their right to work....
https://www.gov.uk/check-job-applicant-right-to-work